What is the method for changing automatic transmission fluid?
2 Answers
Automatic transmission fluid replacement method is as follows: 1. Start the engine for preheating to bring the transmission to operating temperature; remove the drain bolt to collect old fluid from the transmission. 2. After draining all old fluid, remove the oil pan to replace the transmission filter; reinstall the oil pan and tighten the drain plug. 3. Add new transmission fluid; start the vehicle and shift through all gears. 4. Check if the automatic transmission fluid level is normal and make appropriate adjustments. Additional information about transmission fluid replacement: 1. There are two methods for changing transmission fluid: gravity drain method and flush replacement method. 2. The disadvantage of gravity drain method is relatively high residual old fluid, while its advantage is simple operation and less fluid consumption, making it more economical. 3. The flush replacement method has complex operation process and higher fluid consumption as disadvantages, but its advantages include minimal residual old transmission fluid and less severe secondary contamination of new fluid.
Having driven for many years, I know that automatic transmission fluid replacement is something to take seriously. Generally, follow the manual's recommendation to change it every 60,000 kilometers or 4 years, depending on your daily driving habits. The method involves first driving the car to warm up the engine and fluid—thinner fluid drains better. Park and turn off the engine, locate the drain hole at the bottom of the transmission, use a tool to loosen it, and drain the old fluid while catching it to avoid spills. Some cars also have a filter nearby that should be replaced to prevent contaminants from lingering. After draining, tighten the drain plug to avoid leaks, then use a funnel to pour new fluid into the fill port up to the dipstick's standard level. The key is to check the fluid level after running the car for a few minutes to reach operating temperature—ensure the dipstick reading is in the middle. DIY changes save money, but mistakes like overfilling or underfilling can affect transmission performance. I recommend going to a professional shop—they have specialized tools to ensure a thorough change. Transmission components are critical; poor fluid can damage gears, leading to costly repairs. Always use the manufacturer-recommended fluid type—don’t buy random brands.
